I do not recommend you to purchase this kind of apartment.
Actually, if you can find renter, it will be good.
But, it will be very difficult.

And even if you find renter, there is wide gap between gross yield and net yield on investment.
In the cases the amount of monthly rental fee is cheap ( Mostly, in such cases, the amount of purchase price is also cheap. ), monthly Apartment management fee and reserve fund for repair will set off most of your income from your renter.

case you purchase cheap apartment with cheap rental fee, if you need to spend some money to repair air conditioner, wall paper, floor, kitchen, bathroom, it may wipe out your annual income from your renter.

So, when you purchase a cheap apartment, you need to purchase it at very low price. ( = you need to purchase the apartment at very high gross yield rate. )

Or it will be better for you to purchase a higher selling price apartment ( It will be located in suitable area, or with wider room area. ) with higher rental income.
If you do not have enough cash to purchase such one, you can purchase it with your relative, or friend.

Some of potential investors order me to find very high yield rate property.
But please remember that if a property has high yield on investment, there may be some problems.
If current owner can receive enough rental fee to sustain his investment, why is he going to sell the property ?
So, if you demand high yield on investment, you need to confront some problems.
But, in the case of this 550,000 yen apartment, you can not solve the problem.Because, you can not change the location of this apartment.